Spectrum 272: BZL12 Edit
DeleteMeasurement
| Brand |
R-Zilla Zilla Products http://www.zilla-rules.com |
|---|---|
| Lamp Product |
Desert 50 12W |
| Lamp ID |
BZL12 (10/2008) |
| Spectrometer | USB2000+ |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 10 cm |
| Age | 1 hours |
| Originator (measurement) | Frances Baines |
Colorimetry
Colorimetry is the science to describe physically the human color perception. The wavelength range 380 nm - 780 nm is visible to humans and detected by three different photoreceptors. Many Reptiles see the range 350 nm - 800 nm and have an additional UV photoreceptor in their retina.
Whereas a spectrometer measures the intensity in every tiny wavelength interval resulting in thousands of individual intensities, the human eye only measures three intensities detected by the three cones. The same is true for the reptile eye with usually three or four photoreceptors. Effectively the detailled spectrum displayed above reduces to a much compacter bar graph displayed below. The photoreceptor sensitivites from these L-Cone, M-Cone, S-Cone, and U-Cone are used, they are chosen as an average of measured reptile photoreceptor sensitivity curves. The bar graph also shows as reference the intensity seen by the three or four photoreceptors for average sunlight (id 1).
From these three numbers the colour coordinate and the correlated colour temperature for humans are calculated using the CIE standard method. I adapted this concept to a "3 cone reptile (M,S,U)" and a "4 cone reptile (L,M,S,U)". I am sure, that this adaption to other colour spaces makes sense mathematically and this is also done in scientific research regarding colour vision of animals, however I have not seen calculation of colour temperatures for other animals in the scientific literature. Even if it is hypothetical, at least this shows, how arbitrary the colour temperature is, and that the colour temperature calculated for humans does not apply to reptiles. The colour spaces also show the colour coordinates of different phases of daylight ((ids 1, 338 – 451, 511 – 513 ), indicated by crosses, coloured in the appriximate colour perceived by a human.
| Human (CIE) | 3 cone reptile | 4 cone reptile | |
|---|---|---|---|
| Cone Excitation | |||
| Colour Coordinate | ( 0.25 ; 0.2 ) | ( 0.18 ; 0.58 ) | ( 0.15 ; 0.15 ; 0.5 ) |
| CCT | 0 Kelvin | 12000 Kelvin | 23000 Kelvin |
| distance | 0.26 | 0.22 | |
| colour space | 3-D-graph not implemented yet |
Vitamin D3 Analysis
Vitamin D3 is produced by UVB radiation around 300 nm. 7DHC/ProD3 present in the skin is converted to PreD3 when absorbing an UV photon. PreD3 can be converted back to ProD3, to Lumisterol, or to Tachysterol when absorbing another UV photon or can be converted to Vitamin D3 in a warm environment.
This process prevents any overdose of vitamin D3 from UV radiation with a spectrum similar to sunlight. As a comparison the solar spectra at 20°(id:14) and at 85°(id:21) solar angle are shown.
The ratio of the two solarmeters 6.2 (UVB) and 6.5 (UV index) readings has proven a useful and very simply number to acess the spectral shape in the vitamin-d3-active region.
Effective Irradiances
Effective irradiances are calculated for all ranges, actionspectra and radiometers currently present in this database.
The calculation method is a numerical implementation (Simpson's rule) of the formula
To learn more about calculating effective irradiances and radiometers I recommend this excellent report on UVB meters: Characterizing the Performance of Integral Measuring UV-Meters (pdf).
The numbers in the following tables can also be used to estimate certain (effective) irradiances from radiomer readings. Example: If the database lists
- range: UVB (US) = 13.8 µW/cm²
- radiometer: Solarmeter 6.2 = 19.6 µW/cm²
Ranges
total ( 0 nm - 0 nm) 885 µW/cm² = 8.85 W/m² UVC ( 0 nm - 280 nm) 0.0474 µW/cm² = 0.000474 W/m² non-terrestrial ( 0 nm - 290 nm) 0.114 µW/cm² = 0.00114 W/m² total2 ( 250 nm - 880 nm) 885 µW/cm² = 8.85 W/m² UVB (EU) ( 280 nm - 315 nm) 122 µW/cm² = 1.22 W/m² UVB (US) ( 280 nm - 320 nm) 188 µW/cm² = 1.88 W/m² UVA+B ( 280 nm - 380 nm) 554 µW/cm² = 5.54 W/m² Solar UVB ( 290 nm - 315 nm) 121 µW/cm² = 1.21 W/m² UVA D3 regulating ( 315 nm - 335 nm) 235 µW/cm² = 2.35 W/m² UVA (EU) ( 315 nm - 380 nm) 433 µW/cm² = 4.33 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 221 µW/cm² = 2.21 W/m² UVA (US) ( 320 nm - 380 nm) 366 µW/cm² = 3.66 W/m² UVA1 (variant) ( 335 nm - 380 nm) 198 µW/cm² = 1.98 W/m² UVA1 (medical) ( 340 nm - 400 nm) 149 µW/cm² = 1.49 W/m² vis. UVA ( 350 nm - 380 nm) 65.4 µW/cm² = 0.654 W/m² VIS Rep3 ( 350 nm - 600 nm) 347 µW/cm² = 3.47 W/m² VIS Rep4 ( 350 nm - 700 nm) 390 µW/cm² = 3.9 W/m² purple ( 380 nm - 420 nm) 37.1 µW/cm² = 0.371 W/m² VIS ( 380 nm - 780 nm) 330 µW/cm² = 3.3 W/m² VIS2 ( 400 nm - 680 nm) 315 µW/cm² = 3.15 W/m² PAR ( 400 nm - 700 nm) 321 µW/cm² = 3.21 W/m² tmp ( 400 nm - 1100 nm) 326 µW/cm² = 3.26 W/m² blue ( 420 nm - 490 nm) 150 µW/cm² = 1.5 W/m² green ( 490 nm - 575 nm) 71.3 µW/cm² = 0.713 W/m² yellow ( 575 nm - 585 nm) 14.5 µW/cm² = 0.145 W/m² orange ( 585 nm - 650 nm) 34.1 µW/cm² = 0.341 W/m² red ( 650 nm - 780 nm) 23 µW/cm² = 0.23 W/m² IRA ( 700 nm - 1400 nm) 5.59 µW/cm² = 0.0559 W/m² IR2 ( 720 nm - 1100 nm) 1.87 µW/cm² = 0.0187 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 6.96 UV-Index Pyrimidine dimerization of DNA 73.8 µW/cm² Photoceratitis 11.1 µW/cm² Photoconjunctivitis 0.224 µW/cm² DNA Damage 0.659 Vitamin D3 31.6 µW/cm² Photosynthesis 246 µW/cm² Luminosity 671 lx Human L-Cone 97.7 µW/cm² Human M-Cone 88.6 µW/cm² Human S-Cone 137 µW/cm² CIE X 111 µW/cm² CIE Y 91.7 µW/cm² CIE Z 246 µW/cm² PAR 1530000 mol photons Extinction preD3 201 e-3*m²/mol Extinction Tachysterol 701 e-3*m²/mol Exctincition PreD3 92100 m²/mol Extinction Lumisterol 27.8 m²/mol Exctincition Tachysterol 966000 m²/mol Extinction 7DHC 22.4 m²/mol L-Cone 78.4 µW/cm² M-Cone 82 µW/cm² S-Cone 265 µW/cm² U-Cone 108 µW/cm² UVR - ICNIRP 2004 5.28 Rel Biol Eff Melatonin Supression 151 µW/cm² Blue Light Hazard 157 µW/cm² (234 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 35.2 µW/cm² Lumen Reptil 1080 "pseudo-lx" Vitamin D3 Degradation 35.4 µW/cm² Actinic UV 5.22 µW/cm² (77.8 mW/klm) Exctincition Lumisterol 41100 m²/mol Exctincition 7DHC 29900 m²/mol Exctincition Toxisterols 15200 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 214 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 8.97 Leybold UVB 158 µW/cm² Leybold UVA 248 µW/cm² Leybold UVC 0.053 µW/cm² DeltaOhm UVB 326 µW/cm² DeltaOhm UVC 42.7 µW/cm² Vernier UVB 57.8 µW/cm² Vernier UVA 351 µW/cm² Gröbel UVA 360 µW/cm² Gröbel UVB 81 µW/cm² Gröbel UVC -0.00906 µW/cm² Luxmeter 703 lx Solarmeter 6.4 (D3) 28 IU/min UVX-31 347 µW/cm² IL UVB 0.0872 µW/cm² IL UVA 282 µW/cm² Solarmeter 6.5 (UVI, post 2010) 7.52 UV-Index Solarmeter 6.2 (UVB, post 2010) 139 µW/cm² (Solarmeter Ratio = 18.6) Solarmeter AlGaN 6.5 UVI sensor 102 UV Index GenUV 7.1 UV-Index 5.59 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 5.13 W/m² Solarmeter 4.0 (UVA) 3.63 mW/cm² LS122 (manuf.) 0.000242 W/m² ISM400 (first guess) 1.95 W/m² LS122 (assumption) 0.0758 W/m² ISM400_new 1.45 W/m² Solarmeter 10.0 (Global Power) (assumption) 3.55 W/m²